Commutator-brush holder.



Patented Mar. I9, 190i.

., w. n. romznov.

COMHUTATOB BRUSH HOLDER.

(Application filed. Sept. 22, 1900.)

(No Model.)

Inven 02 'ZZZQWZ YW V W2 ZPOWZGT m: mums PETERS COH'PHOYQ-LITHQ,WASHINGTON, n. c.

UNITED STATES PATENT FFICE.

WILLIAM D. POMEROY, OF AKRON, OHIO, ASSlGNOR; TO THE AKRON ELEC- TRICALMANUFACTURING COMPANY, OF SAME PLACE.

COMMUTATOR-BRU$H HOLDER.

SPECIFICATION forming part of Letters Patent No. 670,059, dated March19, 1901. Application filed September 22, 1900. Serial No. 30,838. (Nomodel.)

T at whom, it may concern: a screw and washer 1- In practice the frontBe it known that I, WILLIAM D. POMEROY, end of the tension-finger isforked to secure 55 a citizen of the United States, residing at lateralwidth and lightness. The rear end of Akron, in the county of Summit andState of the tension-finger is widened and curved on 5 Ohio, haveinvented a certain new and use an arc of a circle of which the screw isthe ful Improveinei'itin Oommutator-Brush Holdcenter and has a lateralflange 15, which is ers, of which the following is a specification.notched at intervals in lines radiating from 0 My invention relates toimprovements in the periphery of the hub of the tension-fin that classof brush-holders for commutators ger. Coiled about this hub, surroundingthe 10 in which the holders are mounted on wristscrew 10, is a wirespring 16, one end of which pins that project parallel with thearmatureextends under the cylindrical part of the shaft from a ring thatis mounted in a groove brush -holder body and the other projects 65 inthe box of the armature-shaft and usually backward and is arranged toengage notches eccentric to that shaft and in a plane paralin the flange15. Connecting the supportinglel with the plane of revolution of thecomplate 12 and the lower end of the brush-holder mu'tator. body 8 is aconnecting link-blank 17, of plies The object of my invention is toproduce a of sheet metal, preferably copper, secured to 70 new andimproved brush-holder of the class each by screws, as shown, or otherequivalent designated that will be simple in construcmeans. Theconducting-wire 18 (shown par- 20 tion, effective in operation, and inwhich the tially covered with insulating material) is pressure of thebrush on the commutator may electrically united with a metallic washeron be readily adjusted and the wear of the brush the pin 8. 75 besupplied by an automatic feeding device. In operation the pressure ofthe tension- To the aforesaid object my invention confinger is regulatedby the wire spring 16 and sists in the peculiar and novel construction,is increased and diminished as the projecting arrangement, andcombination of parts here-- end is engaged in the lower or upper notchesinafter described and then specifically pointof the lateral flange 15,while the connecting 80 ed out in the claim, reference being had tolink-blank l7 insures complete electrical conthe accompanying drawings,forming a part nection.

of this specification. Having thus described my invention, what In theaccompanying drawings, in which I claim, and desire to secure by LettersPatsimilar reference-numerals indicate like parts en t, is- 5 in thedifferent views, Figure 1 is an end ele- An improved commutator brushholder vation of my iinproved'brush-holder, the supadapted to be mountedon a wrist-pin paralporting wrist-pin beingshownin section; and lel withthe armatureshaft consisting of a Fig. 2, a plan of the same. bodyarranged to be adjustably secured to Referring to the drawings, 1 is adotted said pin, a tension-finger pivotally mounted o outline of acommutator; 2, a portion of the in said body, bearing at one end apivoted wrist-pin-bearing ring; 3, one of the pins; -1- supporting-plateand a carbon brush secured 40 and 5, insulating-rings on each side ofthe thereto, and having at the opposite end a pin-bearing ring; 6, afixed collar on the pin, notched flange and a spring-wire to engage and7 a nut that secures the pin in place. one of said notches to press thecarbon brush 95 On the pin 3, which in this specification will on thecommutator, saidsupporting-plato and be hereinafter termed thefinger-pivot, is body being electrically connected, substansecured thebrush-holder body 8, which is tially as shown and described.

split on one side, with projecting perforated In testimony that I claimthe abovel hereflanges drawn together by a pair of screws 9. unto set myhand in the presence of two sub- 100 This brush-holder body isbifurcated at the scribing witnesses.

back and between the sides is pivotally W T mouiited, by means of ascrew 10, a tension- VHLLIAM POMEROX' finger 11, on the front end ofwhich is pivotin presence of ally mounted a supporting-plate 12, towhich 0. P. HUMPHREY,

is secured the carbon brush 13 by means of C. HUMPHREY.

